Trump's victories this week make it much more likely that he'll be the party's presidential nominee, probably facing off in November with Democrat Hillary Clinton. That raises the question of how a so-far "self-funding" Trump would pay for what could be a billion-dollar camp…

The day after high-stakes contests in five states, the math and momentum point to a Donald Trump Republican presidential nomination as GOP officials grapple with whether to embrace the billionaire businessman or rally behind a longshot alternative.

Florida Sen. Marco Rubio was among the Republican Party's biggest stars when he burst onto the national stage in the tea party wave of 2010. Now, he is facing a home-state showing on Tuesday that could devastate his 2016 presidential campaign and damage his political brand for years to come.

"There's no question that the decisions that were made were made to benefit the two main Florida sons -- Bush and Rubio," said Joe Gruters, vice chair of the Republican Party of Florida and co-chair of Trump's Florida campaign. "I'm sure they weren't expecting the …

With characteristic brashness, Republican presidential front-runner Donald Trump has staked out uncompromising positions on Asia policy that could potentially roil U.S. relations with the region if he won the White House.

The Florida senator has struggled to reconnect with the kind of voters who sent him to Capitol Hill six years ago as a tea party favorite, instead watching them fuel Trump and his closest challenger to winning the GOP presidential nomination, Texas Sen. Ted Cruz.

Republican presidential front-runner Donald Trump says that, as president, he would push to change laws that prohibit waterboarding and other harsh interrogation techniques, arguing that banning them puts the U.S. at a strategic disadvantage against Islamic State militants.